New SELECT Popup: Reduce the size of JSON data.

Source/web/resources/listPicker.js

 "use strict";
 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var global = {
     argumentsReceived: false,
     params: null,
     picker: null
 };
@@ skipping 297 matching lines @@
         element = createElement("optgroup");
     else if (config.type === "separator")
         element = createElement("hr");
     return element;
 };
 
 ListPicker.prototype._applyItemStyle = function(element, styleConfig) {
     if (!styleConfig)
         return;
     var style = element.style;
-    style.visibility = styleConfig.visibility;
-    style.display = styleConfig.display;
-    style.direction = styleConfig.direction;
-    style.unicodeBidi = styleConfig.unicodeBidi;
+    style.visibility = styleConfig.visibility ? styleConfig.visibility : "";
+    style.display = styleConfig.display ? styleConfig.display : "";
+    style.direction = styleConfig.direction ? styleConfig.direction : "";
+    style.unicodeBidi = styleConfig.unicodeBidi ? styleConfig.unicodeBidi : "";
     if (!styleConfig.color)
         return;
     style.color = styleConfig.color;
     style.backgroundColor = styleConfig.backgroundColor;
     style.fontSize = styleConfig.fontSize + "px";
     style.fontWeight = styleConfig.fontWeight;
     style.fontFamily = styleConfig.fontFamily.join(",");
     style.fontStyle = styleConfig.fontStyle;
     style.fontVariant = styleConfig.fontVariant;
     style.textTransform = styleConfig.textTransform;
 };
 
 ListPicker.prototype._configureItem = function(element, config, inGroup) {
     if (config.type === "option") {
         element.label = config.label;
         element.value = config.value;
-        element.title = config.title;
-        element.disabled = config.disabled;
-        element.setAttribute("aria-label", config.ariaLabel);
+        if (config.title)
+            element.title = config.title;
+        else
+            element.removeAttribute("title");
+        element.disabled = !!config.disabled
+        if (config.ariaLabel)
+            element.setAttribute("aria-label", config.ariaLabel);
+        else
+            element.removeAttribute("aria-label");
         element.style.webkitPaddingStart = this._config.paddingStart + "px";
         if (inGroup) {
             element.style.webkitMarginStart = (- this._config.paddingStart) + "px";
             // Should be synchronized with padding-end in listPicker.css.
             element.style.webkitMarginEnd = "-2px";
         }
     } else if (config.type === "optgroup") {
         element.label = config.label;
         element.title = config.title;
         element.disabled = config.disabled;
@@ skipping 12 matching lines @@
     }
     this._applyItemStyle(element, config.style);
 };
 
 if (window.dialogArguments) {
     initialize(dialogArguments);
 } else {
     window.addEventListener("message", handleMessage, false);
     window.setTimeout(handleArgumentsTimeout, 1000);
 }